Resilient suspension means for motor cycles



a ,RE-SIIL'IENT' SUSPENSION MEANS FQR MOTOR CYCLES ild Jan. 27, 1926 ;2 sn I V ;w. M. TANNER RBSILIENT JSUSI ENSION'MEANS FOR MOTOR CYCLES Filed Jan. 27, 192 I 2 Sheets-Sheet 2 i 35 [wheels of the cycle';

Patented Jilly 21,192

W1LLIA1I-MOSTY1 I::TAN1\IER, OFiWAGGA w AGeA, New sbvmjwr es, l ris'rimrirA.

i eppl'ication filed ianuary 27; 1926, Serial No. 84,232, ahd in lustralia'qanilery 28, 19 25 I Thisinventionrelatesto improved resilient' suspension means for the wheels of 1110- tor cycles andlike'vehicles, v e O'Iieobject of thefnvention is to'provide improved suspension means for motorcycles wherein shocks imparted toe "road wheelf are evenly distributed j between suspension sprlngsarrariged on oppos tesldes ofYsai d'roadwheel, thus re'sultingtin satji'sfajctory even absorption of the road'sliocks. further object is to provide improved spring suspension meens for motor "cycles whereby curb orrebound. of the springs is a reduced: and side sway time cycleis ob- Qvia'ted; thus materially increasing riding comfort. 5 I "According "to the invention; the road wheels of a motor cycle are-carried by forks or a'rms which are pivotally connected to a rigidportion of the cycle frame, andfsemielliptic suspension, springs, provided on op- ];isitelsides of eachof the road wheelspare ink connectedat theirends to said pivoted forlc's or'arms. The fpivoted forks Or arms are connected to crank-rods inounted'on a, rigidportion of the cycle frerne, and these "'cr'ank rods "function to equally distribute the road shocks between the oppositely ar- .r d S p ns o f i f s .v Equalizing leversrnay be provided to curb rebound of .thesuspensionfsprings and also to "evenly distribute the road shocks between the opposite ends of'the suspension springs 'jof the'rear wheel or boththe rear front Ref rences not made to theaccoinpah ng'drawings where n:

' QEigure 1,1 llfvlew in 'slde elevetion fofa "wheel.'" 7

Figure 3. is a" cross sectiona'l View of the "rear part of the cycle frame. v t Figure llis a plan' viewiof Figure 3. e

elements the hinge joint illustrated i e' r 15 I Figure S iseii nlg ge viewer-there motor-cycle provided with the improved resteering wheel. 4

Figure 9 is "avieW of "a detail 'shown in In these views? {indicates the frlan iefof v a"motor-cycl e, 3 thesaddlepill'er bar of the v 7 frame, 4 .theriding saddle, 5 the steeringpillar bar of the: frame, 6'the engine the engine crank-ease 8 thefr ont" road or steeringwheeLf'and 9the rear road or driving wheel of the cycle. Secured by bolts to 6 I h the reer'portion of the" engine crankcase 7. 1 at are cradle plates 10,10 which the lowerend of the saddle' pi'llar bar3fisri gid'1y fastened;

"Fitted toithe upperend of said saddle-pillar a t bar is a clamp '11 ojffitwo-part type; ,tc 7Qv a Which the 'mein horizontal; frame bars '12 and 13"arelsecured.

Connected to the-cradlezplates 10 on the, I

engine crank-caseis a rearwardlvezitend' ing and approximately horizontal bard 4, which is rigidly; stayed 'byen' inclined my bar 15. secured ;.to" lugs 16,011 said horizontal bar and also to said, cradle "plates 10.

Formedlat the rear end ofsaidhorizontal har 14 fare bosses 17 "end "18 infwhich; are fitted two angular :frain'e" bars, arranged bne on'each' side of theflreanroador driving wheel 9. Each of ssaidf "angular'frame bars comprises an upwardly inclined memb er'19 endear; integral horizontal Ineinber 20 which extends; forwardly from the upperendof r,

said inclined member and is secured at ts forwardfend to said-clamp 11 on the saddle pillar-bar 3 Thelhorizontahbar 14 and the two angular frame bars constitute a rigid 9 part of thefmotor-cycle frame.

Pivotally 1 connected; to the rear 1 end of, 1 the horizontal bar 14; by 'a hinge "joint" 21 r is 1 a fork 22 supporting" the rear road wheel Qtofthecydle. Thehin'gefljoint21, ,which 9 is illustratedin detail" in "F ig'u'res 5, 6' 'ands '7, is of the knuckle j'type, comprising two sets of interfitting lugs 23 and "245' formed respectively on the 'horizo'ntal'ba r 14 and the H Wheel .f0'rk 22 and pivotall y connected toi Figure 5 1s a detail View of a hingejoinfl provided inthe rear part ofthe cycle frame. Figures Gfan'd 7 are detail .plan views of gether by 'a'hinge pinf25f. k H

F'Xedly mounted in bos's'es'26for1ned at i' v the epices'of the? we angular frarr'l'e "bars" 19-20",is a bar 27 rigid-1ylconnecting said angular frame bars. This bar- 271s" com stru ctedhaving two 'leter a'lf arms 28 of cirstraightened,

cular cross-section and a central arched member 29, which fits over the tire of the rear road Wheel 9see Figure 3. Clamped to said arms 28 of the transverse bar 27 by U- bolts 30 and bearer blocks 31 are suspension springs 32 preferably of the semi e11ipt1c type.-

9 and each ispivotally attached at its opposite ends by links 33 to the ends of oscillating levers 34'. These levers 34, which are provided toequalize shocks between the endslofrthesnrings 32, are arranged on opposite sides of the wheel and they are pivoted. to: the wheel fork 22 by. pivot pins 35 arranged directly above the Wheel centre.

Pivotally. connectedto alug 36formed at the central. portion of each equalizing; lever 34; is an approximately vertical connecting link 37, which is pivotally attached at its upperv endlto acrank. 38 on. a rod. 38,.w-hich is, common to bothofv said links 37 and is rotatably mounted in lugs v89 formed on the horizontal. members 20. offsaid, angular frame bars. I

When a road shock, is impartedtothe rear cycle wheel 9,,the rear. wheel. for-k 22moves upwardly; inwhichaction itcpivots fromthe hingejoint2l, andlthe cy cle wheel rises into the central arched member 29 of. the transversehar 27-. The shock imparted, to" the cycle roadwheel. is transmitted by the links 83 to the, opposite ends of the suspension springs 32 and causes said: springs to be thus absorbing the shock. Simultaneously the. vertical links 37v rotate tlie -crank-r.od- 38.and. cause the shock. to-be distributedv evenly at opposite side of the road wheel. Byaneans of saidcrank-rodand its link connections, all road: shocks imparted to.the rear cycle wheel are-equally distributed. between. the suspension. springs, 32 on opposite sidesao'f the wheelv and; an even absorption-of the shocks with increased-rid ing comfortis ensured. I

During the,m0vement:of the. wheel. 9 occasioned, by road. shocks, the oscillating 1e vers automatically; adjust themselves on their pivot pin 85.:andcausethe shocks tobe appliedrequallygtolthe opposite'ends of: the

suspension. springs- 32, wherebyv rebound. of said springs is, curbed.

The spring suspension for the front road Wheel of the motor=cycle comprises a, flat plate- L0; which issecuredto the lower end of thesteering, column 5. This plate is suitably. stayedbyv aninelinecbstay-ban 41. connected, at its upper end ntoc a clamp 4L2fitted around said steeringtcolumn. I Itittedinbosses l3'iformedon the-underneath surface of said flat platetO ardforlemembers 44, whichare arrangedtwo on eachsi'de ofrthe front road These suspension springs are positlon'ed one on each side of the rear road wheel supporting arms 46 is a link 51, which is connected at its'upper end'to a crank 52 on the rod 52, which is common to both of saidili'nks 5lfand is revolvably. mounted in; apertured lugs 53 formed atthe forward end of" said flat. plate 40.. 1

IV hen a road shock is-imparted'to the for: ward wheel 8, the-horizontal.arms. 4L6. move upwardly by pivoting from. their. brackets 45, and the links 47' transmit the, shock, to. the ends of the, suspension springs. 48,.causing said springs tobe straightenediand'ltlie shock to be absorbed As the road wheellm'ovesup; wardly. the links 51 simultaneously. rotate-the crank-rod. 52. and cause the shocktoibeequallly distributed on opposite sides of'themoad wheel for absorption equally by the-opposite ly arranged suspension spring 485.

Small. rollers such. as 54; (see Figures. 3 and9) are revolvably mountedlonrtheunderneath surface. of. the arched member; 29f of the transverse, bar27 and. on the underneath surface of the flatv plate 40. to provide antifriction meansfor. the road.v wheels 9. and 8 should same be caused toiri'se by road shocksto such. anextentthat otherwise-they would. contact, with ,frame. members? ofithe cycle.

What I do claim.is.:

1. Improved resilientlsuspension.meansvfor cycles comprising, pivoted. arms, supporting the, road wheels, semiselliptic; suspension springs. arranged on opposite sides. of said wheels, link. connections between said-pivoted' supporting arms and the opposite. ends of said. suspension springs; and crank-rods rotatable on the cycleframe, and; connected on oppositegsidesiof. the roadwheels tosaid pivotedlsupportingarms-whereby shocks .im-

parted to the road wheels areevenly distribcillating. shock-equalizing levers-are. pivoted v to the wheel supporting. arms, and'the' semielliptic suspension springs. are connected at their opposite ends to saidequalizingj levers. Improved resilient.suspension means for a road wheel offa cycle comprising, apivot'ed fork supporting. the: road; wheel; .rigidlframe bars arranged on opposite sides ;of'.said.- road Wheel; a transverse. barrconnecting said'ffifiame bars, semi-elliptic suspension springs arranged on opposite sides of the'wheel and secured to said transverse bar, link connections between the pivoted fork andthe opposite ends ofsaid suspension springs, a crank-rod rotatably mounted on said framebars, and connections on each side of theroad wheel between the pivoted fork and said crank-rod.

4; Improved resilient suspension means for a road wheel ofa cycle as claimedin claim 3; and wherein the frame bars are connected to ahorizontal bar thatis carried'bythe cycle frame, and the wheel supporting forkis pivoted to said horizontal bar.

5. Improved resilient suspension means for a road wheel of a cycle as claimed in claim 3,

and wherein the transverse bar is formed 7 having an arched member to .fit over the tire mounted on said arched member.

offthe wheel, and an anti-friction roller I l 6. Improved IBSlllBIltiSLlSPIlSlO-Il means for oted to said/forks and supportingv the front road wheel, semi-elliptic suspension springs I carried by said plate link connections be tween the wheel supporting arms and the oppositeen'dsof said suspension springs, a

crank-rod rotatable on said plate, and connections on both sides of-the wheel between thewheel -supporting arms and said crank rod. a I a In testimony whereof I affix my signature. WILLIAM MOSTYN TANNER. 

